Rules of construction of farmhouse in Karnataka

Hi

I own 1 acre agriculture land parcel near kolar, planning to construct a small farmhouse. Just wanted to check if anyone has recently done with a farmhouse construction in Karnataka:

1- what permissions are required?

2- how much area can be utilised?

3- is conversion required?

4- there is no Nakashe road to land, but there is mud road from tar road passing through 5-6 land parcels which is in use from 30-40 years, good enough for a tractor or JCB to pass.